Old people falling in love: appealing. Conjoined twins and their wacky adventures: not as appealing. At least that’s the American public’s apparent view according to this week’s box office performance. Diane Keaton and Jack Nicholson claimed the No. 1 spot with their romance ”Something’s Gotta Give,” while the Farrelly brothers’ ”Stuck on You” barely cracked double digits.

Buoyed by mostly strong reviews, particularly for Keaton, ”Something’s Gotta Give” premiered with $17 million, according to studio estimates. That’s a boon for Keaton’s already-strong Oscar chances, which, in turn, should help the film perform well over the coming weeks.

Second place went to last week’s top film, ”The Last Samurai,” which slipped 42 percent to $14.1 million in its second week. The Tom Cruise epic has grossed $46.8 million after 10 days. For comparison’s sake, Russell Crowe’s action adventure ”Master and Commander” fell 39 percent in its second weekend and had a similar 10-day gross of $47.3 million.

”Stuck on You,” starring Matt Damon and Greg Kinnear as the aforementioned twins, opened with an underwhelming $10 million despite some surprisingly good critical response (including an A- from EW’s Owen Gleiberman). And the news was even worse for the teen romance ”Love Don’t Cost a Thing,” starring ”Drumline”’s Nick Cannon and pop singer Christina Milian, which debuted with only $6.5 million.

The race for No. 5 is up in the air for now. Disney says Eddie Murphy’s ”The Haunted Mansion” earned $6.3 million, while estimates for the comedies ”Bad Santa” and ”Elf” are each $6.2 million. Whatever the case, in the next 10 days, ”Elf” will become one of the top 100 highest-grossing films of all time.